godot/platform/iphone/detect.py
Hein-Pieter van Braam e5b335d367 Don't use -ffast-math or other unsafe math optimizations
Godot supports many different compilers and for production releases we
have to support 3 currently: GCC8, Clang6, and MSVC2017. These compilers
all do slightly different things with -ffast-math and it is causing
issues now. See #24841, #24540, #10758, #10070. And probably other
complaints about physics differences between release and release_debug
builds.

I've done some performance comparisons on Linux x86_64. All tests are
ran 20 times.

Bunnymark: (higher is better)
(bunnies)    min    max  stdev average
fast-math   7332   7597    71     7432
this pr     7379   7779   108     7621 (102%)

FPBench (gdscript port http://fpbench.org/) (lower is better)
(ms)
fast-math  15441  16127   192    15764
this pr    15671  16855   326    16001  (99%)

Float_add (adding floats in a tight loop) (lower is better)
(sec)
fast-math   5.49   5.78  0.07     5.65
this pr     5.65   5.90  0.06     5.76  (98%)

Float_div (dividing floats in a tight loop) (lower is better)
(sec)
fast-math  11.70  12.36  0.18    11.99
this pr    11.92  12.32  0.12    12.12  (99%)

Float_mul (multiplying floats in a tight loop) (lower is better)
(sec)
fast-math  11.72  12.17  0.12    11.93
this pr    12.01  12.62  0.17    12.26  (97%)

I have also looked at FPS numbers for tps-demo, 3d platformer, 2d
platformer, and sponza and could not find any measurable difference.

I believe that given the issues and oft-reported (physics) glitches on
release builds I believe that the couple of percent of tight-loop
floating point performance regression is well worth it.

This fixes #24540 and fixes #24841
2019-01-09 02:06:13 +01:00

185 lines
7.7 KiB
Python

import os
import string
import sys
from methods import detect_darwin_sdk_path
def is_active():
return True
def get_name():
return "iOS"
def can_build():
if sys.platform == 'darwin' or ("OSXCROSS_IOS" in os.environ):
return True
return False
def get_opts():
from SCons.Variables import BoolVariable
return [
('IPHONEPATH', 'Path to iPhone toolchain', '/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain'),
('IPHONESDK', 'Path to the iPhone SDK', ''),
BoolVariable('game_center', 'Support for game center', True),
BoolVariable('store_kit', 'Support for in-app store', True),
BoolVariable('icloud', 'Support for iCloud', True),
BoolVariable('ios_exceptions', 'Enable exceptions', False),
('ios_triple', 'Triple for ios toolchain', ''),
]
def get_flags():
return [
('tools', False),
]
def configure(env):
## Build type
if (env["target"].startswith("release")):
env.Append(CPPFLAGS=['-DNDEBUG', '-DNS_BLOCK_ASSERTIONS=1'])
if (env["optimize"] == "speed"): #optimize for speed (default)
env.Append(CPPFLAGS=['-O2', '-ftree-vectorize', '-fomit-frame-pointer'])
env.Append(LINKFLAGS=['-O2'])
else: #optimize for size
env.Append(CPPFLAGS=['-Os', '-ftree-vectorize'])
env.Append(LINKFLAGS=['-Os'])
if env["target"] == "release_debug":
env.Append(CPPFLAGS=['-DDEBUG_ENABLED'])
elif (env["target"] == "debug"):
env.Append(CPPFLAGS=['-D_DEBUG', '-DDEBUG=1', '-gdwarf-2', '-O0', '-DDEBUG_ENABLED', '-DDEBUG_MEMORY_ENABLED'])
if (env["use_lto"]):
env.Append(CPPFLAGS=['-flto'])
env.Append(LINKFLAGS=['-flto'])
## Architecture
if env["arch"] == "x86": # i386
env["bits"] = "32"
elif env["arch"] == "x86_64":
env["bits"] = "64"
elif (env["arch"] == "arm" or env["arch"] == "arm32" or env["arch"] == "armv7" or env["bits"] == "32"): # arm
env["arch"] = "arm"
env["bits"] = "32"
else: # armv64
env["arch"] = "arm64"
env["bits"] = "64"
## Compiler configuration
# Save this in environment for use by other modules
if "OSXCROSS_IOS" in os.environ:
env["osxcross"] = True
env['ENV']['PATH'] = env['IPHONEPATH'] + "/Developer/usr/bin/:" + env['ENV']['PATH']
compiler_path = '$IPHONEPATH/usr/bin/${ios_triple}'
s_compiler_path = '$IPHONEPATH/Developer/usr/bin/'
ccache_path = os.environ.get("CCACHE")
if ccache_path is None:
env['CC'] = compiler_path + 'clang'
env['CXX'] = compiler_path + 'clang++'
env['S_compiler'] = s_compiler_path + 'gcc'
else:
# there aren't any ccache wrappers available for iOS,
# to enable caching we need to prepend the path to the ccache binary
env['CC'] = ccache_path + ' ' + compiler_path + 'clang'
env['CXX'] = ccache_path + ' ' + compiler_path + 'clang++'
env['S_compiler'] = ccache_path + ' ' + s_compiler_path + 'gcc'
env['AR'] = compiler_path + 'ar'
env['RANLIB'] = compiler_path + 'ranlib'
## Compile flags
if (env["arch"] == "x86" or env["arch"] == "x86_64"):
detect_darwin_sdk_path('iphonesimulator', env)
env['ENV']['MACOSX_DEPLOYMENT_TARGET'] = '10.9'
arch_flag = "i386" if env["arch"] == "x86" else env["arch"]
env.Append(CCFLAGS=('-arch ' + arch_flag + ' -fobjc-abi-version=2 -fobjc-legacy-dispatch -fmessage-length=0 -fpascal-strings -fblocks -fasm-blocks -isysroot $IPHONESDK -mios-simulator-version-min=10.0 -DCUSTOM_MATRIX_TRANSFORM_H=\\\"build/iphone/matrix4_iphone.h\\\" -DCUSTOM_VECTOR3_TRANSFORM_H=\\\"build/iphone/vector3_iphone.h\\\"').split())
elif (env["arch"] == "arm"):
detect_darwin_sdk_path('iphone', env)
env.Append(CCFLAGS='-fno-objc-arc -arch armv7 -fmessage-length=0 -fno-strict-aliasing -fdiagnostics-print-source-range-info -fdiagnostics-show-category=id -fdiagnostics-parseable-fixits -fpascal-strings -fblocks -isysroot $IPHONESDK -fvisibility=hidden -mthumb "-DIBOutlet=__attribute__((iboutlet))" "-DIBOutletCollection(ClassName)=__attribute__((iboutletcollection(ClassName)))" "-DIBAction=void)__attribute__((ibaction)" -miphoneos-version-min=10.0 -MMD -MT dependencies'.split())
elif (env["arch"] == "arm64"):
detect_darwin_sdk_path('iphone', env)
env.Append(CCFLAGS='-fno-objc-arc -arch arm64 -fmessage-length=0 -fno-strict-aliasing -fdiagnostics-print-source-range-info -fdiagnostics-show-category=id -fdiagnostics-parseable-fixits -fpascal-strings -fblocks -fvisibility=hidden -MMD -MT dependencies -miphoneos-version-min=10.0 -isysroot $IPHONESDK'.split())
env.Append(CPPFLAGS=['-DNEED_LONG_INT'])
env.Append(CPPFLAGS=['-DLIBYUV_DISABLE_NEON'])
if env['ios_exceptions']:
env.Append(CPPFLAGS=['-fexceptions'])
else:
env.Append(CPPFLAGS=['-fno-exceptions'])
## Link flags
if (env["arch"] == "x86" or env["arch"] == "x86_64"):
arch_flag = "i386" if env["arch"] == "x86" else env["arch"]
env.Append(LINKFLAGS=['-arch', arch_flag, '-mios-simulator-version-min=10.0',
'-isysroot', '$IPHONESDK',
'-Xlinker',
'-objc_abi_version',
'-Xlinker', '2',
'-F$IPHONESDK',
])
elif (env["arch"] == "arm"):
env.Append(LINKFLAGS=['-arch', 'armv7', '-Wl,-dead_strip', '-miphoneos-version-min=10.0'])
if (env["arch"] == "arm64"):
env.Append(LINKFLAGS=['-arch', 'arm64', '-Wl,-dead_strip', '-miphoneos-version-min=10.0'])
env.Append(LINKFLAGS=['-isysroot', '$IPHONESDK',
'-framework', 'AudioToolbox',
'-framework', 'AVFoundation',
'-framework', 'CoreAudio',
'-framework', 'CoreGraphics',
'-framework', 'CoreMedia',
'-framework', 'CoreMotion',
'-framework', 'Foundation',
'-framework', 'GameController',
'-framework', 'MediaPlayer',
'-framework', 'OpenGLES',
'-framework', 'QuartzCore',
'-framework', 'Security',
'-framework', 'SystemConfiguration',
'-framework', 'UIKit',
])
# Feature options
if env['game_center']:
env.Append(CPPFLAGS=['-DGAME_CENTER_ENABLED'])
env.Append(LINKFLAGS=['-framework', 'GameKit'])
if env['store_kit']:
env.Append(CPPFLAGS=['-DSTOREKIT_ENABLED'])
env.Append(LINKFLAGS=['-framework', 'StoreKit'])
if env['icloud']:
env.Append(CPPFLAGS=['-DICLOUD_ENABLED'])
env.Append(CPPPATH=['$IPHONESDK/usr/include',
'$IPHONESDK/System/Library/Frameworks/OpenGLES.framework/Headers',
'$IPHONESDK/System/Library/Frameworks/AudioUnit.framework/Headers',
])
env['ENV']['CODESIGN_ALLOCATE'] = '/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/codesign_allocate'
env.Append(CPPPATH=['#platform/iphone'])
env.Append(CPPFLAGS=['-DIPHONE_ENABLED', '-DUNIX_ENABLED', '-DGLES_ENABLED', '-DMPC_FIXED_POINT', '-DCOREAUDIO_ENABLED'])
# TODO: Move that to opus module's config
if 'module_opus_enabled' in env and env['module_opus_enabled']:
env.opus_fixed_point = "yes"
if (env["arch"] == "arm"):
env.Append(CFLAGS=["-DOPUS_ARM_OPT"])
elif (env["arch"] == "arm64"):
env.Append(CFLAGS=["-DOPUS_ARM64_OPT"])